Coating composition and process



PATENT. OFFICE.

UNITED srares- LYNDON D. WOOD, BALL, PENNSYLVANIA.

COATING COMPOSITION AND PROCESS.

80 Drawing.

T all whom it may concern:

Be it known that I, LYNDON D. W000, a citizen of the United States,residing at Bala, in the county of Montgomery and State of Pennsylvania,have inventednew and useful Improvements in Coating Composition andProcesses, of which the follow-' in is a specification.

' his, invention relates to compositions for coating surfaces wherebysaid surfaces under the'al ction of light are rendered sensitive toelectric currents and it has more particular reference 'to a process formaking a sensitive compound for use in the reproduction of sound waveswhich have been photo graphed upon films or plates.

The object of this invention is the production of .the naturehereinbefore referred to which when applied to a surface capable ofconducting electric currents renders the same usable for thereproduction of soundv waves by the action of waves of light.

My composition consists essentially of a. mixtureof:

. Parts. Platinum-barium-cyanide of potassium.

crystals 20 Tungstate of soda 10 Selenium crystals 7 0 Salt 34: Sulphur33 Phosphorus 33 Although I have specified the proportions above setforth there can be slight modifications thereof Without lessening theefiiciency and sensitiveness of my composition.

The platinum-barium-cyanideof potassium crystals, tungstate of soda andselenium crystals are thoroughly mixed and brought mass is thensubjected to a sudden cooling by being plunged into a. receptaclecontaining water at a temperature of approximately 4.0 FahrenheitApplication filed m 'i, 1922. Serial No. 512,324.

The resultant compositionmay be applied to any desired surface byreheating it until it is a'gainreduced to a molten condition intowhich'mass the objector surface to be coated can then be dipped or.immersed until a proper. coating has been applied thereto, when it can.be withdrawn-and allowed to cool and harden.

' This composite material when applied to any suitable body and exposedto the action of light void of violet rays will affect an electrical,current passing through it in accordance with the variation in intensityand character of the light vibrations received by it and therefore hasthe facility and property of translating light waves and variationstherein into electric pulsations and variations thereof. An element socoated by this material composed and prepared as above described is whatmay be termed a sensitive to light element by which the reproduction ofsound waves preferably photographically recorded on a film. or plate canbe accurately accomplished by electric and electro-magnetic co operatingmeans,

Having thus'described my invention, what I claim'as new and desire tosecure by Letters Patent is:

1. A sensitive compound for use in the reproduction of sound waves whichhave been photographically vrecorded comprising '20 parts ofplatinum-barium cyanide of potassium crystals, '10 parts of tungstate ofsoda, 70 parts of selenium crystals, 34 parts of salt, 33 parts ofsulphur, 33 parts of phosphorus.

2. The process of producing a sensitive compound for use in thereproduction of sound waves which have, been photographt cally recorded,consisting in reducing to'a molten mass a mixture ofplatinum-bariumcyanide of potassium crystals, tungstate of soda andselenium crystals and to this molten mass adding a mixture of salt, sul-.phur and phosphorus and keeping the whole in a molten condition for acontinued period of approximately 30 minutes or until a flame colorindicating the flame of both barium and potassium rises from the massand then crystallizing the mass by suddenly immersing it into areceptacle of water at a temper-' ature of approximately 40 Fahrenheit.

In testimony whereof I afiix my signature.

LYNDON D. WOOD.

